Fair Value Measures and Disclosures (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | $ 1,492 | $ 1,253 |
Long-term marketable securities | 365 | 650 |
Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 42 | |
Short-term marketable securities | 169 | 373 |
U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 5 | 50 |
Short-term marketable securities | 986 | 670 |
Long-term marketable securities | 252 | 487 |
U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 47 | 69 |
Long-term marketable securities | 51 | 49 |
Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 15 | |
Short-term marketable securities | 226 | 141 |
Long-term marketable securities | 56 | 114 |
Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 64 | |
Long-term marketable securities | 6 | |
Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 2,255 | 2,497 |
Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 336 | 544 |
Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 5 | 50 |
Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 42 | |
Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 169 | 373 |
Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 986 | 670 |
Long-term marketable securities | 252 | 487 |
Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 47 | 69 |
Long-term marketable securities | 51 | 49 |
Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 15 | |
Short-term marketable securities | 226 | 141 |
Long-term marketable securities | 56 | 114 |
Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 64 | |
Long-term marketable securities | 6 | |
Level 1 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 406 | 544 |
Level 1 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 336 | 544 |
Level 1 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 1 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Level 1 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 1 | Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 64 | |
Long-term marketable securities | 6 | |
Level 2 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 1,849 | 1,953 |
Level 2 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 2 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 5 | 50 |
Level 2 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 42 | |
Level 2 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 169 | 373 |
Level 2 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 986 | 670 |
Long-term marketable securities | 252 | 487 |
Level 2 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 47 | 69 |
Long-term marketable securities | 51 | 49 |
Level 2 | Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 15 | |
Short-term marketable securities | 226 | 141 |
Long-term marketable securities | 56 | 114 |
Level 2 | Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | |
Long-term marketable securities | 0 | |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 0 | 0 |
Liabilities | 0 | 0 |
Level 3 | Fair Value, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets | 0 | 0 |
Level 3 | Fair Value, Recurring | Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 3 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Level 3 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Level 3 | Fair Value, Recurring | Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Level 3 | Fair Value, Recurring | U.S. Treasury securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 3 | Fair Value, Recurring | U.S. government agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | 0 |
Level 3 | Fair Value, Recurring | Corporate bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | |
Short-term marketable securities | 0 | 0 |
Long-term marketable securities | 0 | $ 0 |
Level 3 | Fair Value, Recurring | Mutual Funds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term marketable securities | 0 | |
Long-term marketable securities | $ 0 | |